A.O. Smith 120 through 250 Series, Installation, User And Service Manual

Page: 99 / 104

Instruction manual BFC 97
is
TERMINAL BLOCK CONNECTIONS:
Earth
N Neutral
L Live input of controller
L
1
Phase input of isolating transformer
(primary side)
L
2
Phase output of isolating transformer
(secondary side)
L
3
Phase input of program-controlled pump
COMPONENTS:
A Control
B Flame probe
C Hot surface igniter
D Gas control valve
E Burner earth connection
F Extra ON mode switch
G Program-controlled pump (max. 100W)
H Extra error signal connection
J Isolating transformer
K Double-pole isolator
L Controller 0/I switch
M Display
N Fan
O Temperature sensor (T
2
- bottom of tank)
P Dummy
Q Temperature sensor (T
1
- top of tank)
R Selection resistor
S Push button
T Electrical anodes
U Signalling for electrical anodes
V Potentiostat
CONTROLLER CONNECTIONS:
J2 Power connection for controller
J19 Extra error signal connection
J20 Gas control valve connection
J21 Program-controlled pump connection
J40 Fan connection
J36 Controller display connection
JP2 Flame probe and hot surface igniter
connection
JP3 Temperature sensor T
2
connection
JP4 Dummy connection
JP5 Temperature sensor T
1
connection
JP6 Selection resistor and pressure switch
connection
JP8 Extra ON mode switch connection
F1 Fuse (T 3.15 A - 250 V)
F3 Fuse (T 3.15 A - 250 V)